Control-valve of gas-burner-operating mechanism.



H. MENZEL.

CONTROL VALVE OF GAS BURNER OPERATING MECHANISM.

APPLICATION FILED JUNE 19, 1913.

1, 1 21 ,2'76. Patented Dec. 15, 1914.

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EERIEANN MENZEL, OF BERLIN,

as ATN @FFTC:

GERMANY, ASSIGNOB T0 BERLIN-ANHALTISCHE TION 0F GERMANY.

CONTROL-VALVE 0F GAS-BURNER-OPERATING MECHANISM.

menace.

Specification of Letters Patent.

Patented Dec. 1.5, 1914:.

Application filed June 19, 1913. Serial No. 774,719.

To (ZZZ whom it may concern Be it known that I, IIERMANN MENznL, a subject of the German Emperor, and resident of Berlin, Germany, have invented cer tain new and useful Improvements in Control-Valves of Gas-Burner-Operating Mechanism, or" which the following is a specification.

This invention relates to control valves of gas burner operating mechanism actuated from a distance, of the type wherein on a temporary, intentional increase in the gas pressure taking place, a diaphragm or yielding pressure member is moved so that the mechanism is actuated to open or close the valve supplying gas to the burner. Only when the pressure in the mains is intentionally increased does the opening of the control valve place the gas supply pipe in communication with the casing of the yielding pressure member, and this member is then exposed to the full pressure of the gas, so

, that the whole energy of the gas is utilized for actuating the valve-operating mechanism. In such cases, the control valve is regulated by a spring, weight or the like, adjusted to correspond to the increased pressure at which the burner mechanism is to be actuated.

Hitherto it has been proposed to provide control valves wherein the gas supplied to the operative side of the main pressure member is controlled by an auxiliary pressure member, one side of which is weighted in accordance with the increased actuating pressure. Only a portion of the auxiliary memher is exposed to the gas pressure in the position of rest, the whole surface of the auxiliary member not becoming effective until the control valve has opened. Since the load on the other side of the auxiliary pressure member is achusted to correspond to that which the gas pressure exerts on the portion which is normally exposed, during which time the control valve occupies its ready or set position, the extra load on the auxiliary pressure member due to the opening of the control valve produces a correspondingly increased counter-pressure acting in opposition to the regulating spring. This increased counter-pressure can only be overcome by the spring when the pressure in the gas. pipe has become less than the temporarily increased actuating pressure by an extent equal to the additional load on the auxiliary pressure member. The regulating spring can only then close the control valve and thus bring the lighting device into its ready or set position, whereas minor variations in the pressure within the pipes do not affect the control valve.

The object of the present invention is to provide a control valve of this type which cannot prematurely return into the ready or set position under any circumstances.

According to this invention, that portion of the control valve which is secured to the auxiliary pressure member, is attached thereto in an interchangeable manner, a set or series of interchangeable valve members of varying sizes being provided, and the seat with which this valve cooperates is of a diameter greater than that of the largest valve employed. As a result, the proportion between the surface of the auxiliary pressure member which is exposed to the gas pressure when the control valve is closed, and the total area of the auxiliary member when wholly exposed to gas, when the control valve is open, can readily be varied, so that any oscillations which occur in the gas supply pipe can be dealt with as experience or practice proves to be neces sary.

The accompanying drawing shows, by way of example in vertical section, partly in elevation one construction of control valve in conjunction with a device for lighting a gas burner from a distance.

Into the bottom of the casing 1 of the device for lighting gas burners from a distance which is shown only diagrammatically) opens the gassupply pipe 2, while to the upper portion of the casingis connected the branch 3 leading to the burner. In the casing 1 is mounted the usual main pressure member 4 which, in the construction illustrated, is in the form of a diaphragm, the movement of which produced by fluctuations in thegas pressure are transmitted by a rod 5 to an operating device for the burner (not shown in the drawing).

To the casing 1 of the lighting device is connected a chamber, the inner space 6 of which communicates with the interior of the casing 1 by means of an opening 8 formed in the partition 7. When the lighting device is ance with the particular actuating pressure which is employed. The chamber 6 communicates with the atmosphere by an opening 13 and the central portion 14: of the partition 7 forms a seat for the interchangeable 15 valve member 9 of the controlvalve and has a larger diameter than the largest valve member used.

' When the control valve is in the position of rest, as shown in the drawing, theincreased pressure in the gas pipe 2, 11 which is produced for the lighting acts only on the annular surface of the diaphragm 10, which is not covered by the valve 9. As soon as the required operating pressure, (for instance 60 mm. of water) corresponding to the pressure of thespring 12, has been reached, the valve 9 moves away from the opening 8 so that the increased pressure can act to the v full extent on the working diaphragm 4. 3o Owing to the pressure of 60 mm. in the pipe 2, 1-1 thenacting on the whole effective surface of the auxiliary diaphragm 10, including the valve body 9' carried thereby, the spring 12 will be forced back with a greater force corresponding to this additional load. Consequently the spring 12 will bring the auxiliary diaphragm 10 back into the position ready for acting and close the .valve, only when the pressure in the gas pipe 2,11 40 has sunk to an extent corresponding to the additional load on the auxiliary diaphragm 10. If the extent of this additional load is J assumed-to lee-in accordance to the size of the valve 9, for instance 15 mm., the pressure in the gas pipe 2, 11 must first sink to 45 mm. before'the spring 12 can again bring the lighting device into th ready or set position. a By removing the valve member 9', and substituting another valve member of a different size or diameter it is possible to regulate the sensitiveness of the control valve as required, by varying the proportion between the total area of the diaphragm 10 and that portion thereof normally exposed to the gas'pressure when the control valve is in the ready position. This circumstance is of great importance as it' is not only possible to take into account gas pressure fluctuations of diii'erent magnitude in thegas pipes and even at individual points I therein, so that premature return of the control valve to the ready position is precluded under any circumstances but, further, it is possible to avoid keeping the controlvalve open for an unnecessarily long time, as is essential in order to overcome fluctuations of the diaphragm.

It will be appreciated that the details of construction can be modified in various ways, without departing from this invention. a

I claim: 1. In apparatus of the class described, the combination of a casing, a perforated partition in said casing, diaphragms on opposite sides of said partition, operating mechanism connected with one of said diaphragms, and a valve member secured removably to the other diaphragm and adapt- 0 ed normally to close the perforation in said partition, the casing being provided with a channel forsupplying amedium under pressure to the space between the last-named diaphragm and said partition.

2. In apparatus of the class described, the combination of a casing having a perforated partition and a channel for conveying a medium under pressure to one side of said partition, movable pressure members located on 99 opposite sides of said partition, operating mechanism connected vwith one member; which is located on the side of the partition opposite to that to whichsaid channel leads, and a valve member secured removably to the other pressure member and adapted to normally close. the perforation in said partition.

3. In apparatus of the class described, the combination of a casing having a partition 1 0 provided with a perforation and with o a valve seat at one end of said perforation,- and also with a channel for conveying a medium under pressure to that side of'said partition on which said Valve seat is located, movable pressure members located on opposite sides of said partition, operating mechanism connected with the member. which is located on the side. of the partition opposite to that on which said valve seat'is 11o arranged, and a valve member adapted to be secured removably to the other. pressure member and to normally engage said valve seat for closing said perforation."

4:. In apparatus of the class described, the

combination, with two chambers, a passage connecting them, a valve seat at one end of said passage, and a channel for conveying a medium under pressure to the chamber in which said valve seat is located, of movable pressure members situated in said chambers, a'valve adapted to fit 'said valve seat and adapted to be secured detachably to the pressure member which is adjacent to said seat,

and operating mechanism connected with v the other pressure member... a

5. In apparatus of the, class described, the combination, with two chambers, a passage connecting them, a valve seat located at one end of said passage and "of a diameter we materially greater than said end so as to afford a seating surface for valves of dif ferent diameters, and a channel for conveying a medium under pressure to the chamber in which said valve seat is located, of movable pressure members arranged in said chambers, a valve adapted to engage said' seat and secured detachably to the pressure member which is adjacent to said seat, and

operating mechanism connected with the 10 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

